Introduction
The Aigo A18 is a versatile 22-key mechanical numeric keypad designed for enhanced productivity. It offers dual-mode connectivity, supporting both 2.4G wireless and USB Type-C wired connections, allowing for flexible use across various devices and scenarios. Featuring PBT two-color keycaps and a full-key hot-swappable design, the A18 provides a customizable and durable typing experience. Its compact size and built-in rechargeable lithium battery make it an ideal portable solution for frequent number input and calculations.

Image: Aigo A18 Mechanical Numeric Keypad showcasing its design in white, beige, and black color options.
Setup
Charging the Keypad
The Aigo A18 is equipped with a 600mAh rechargeable lithium-ion battery. Before initial use, or when the battery is low, connect the keypad to a power source using the provided USB Type-C cable. A full charge typically takes approximately 2 hours.

Image: Diagram illustrating the Aigo A18's battery life (approx. 45 days usage) and charging time (approx. 2 hours).
Wired Mode Connection
- Insert the USB Type-C end of the charging cable into the Type-C port on the keypad.
- Connect the standard USB-A end of the cable to an available USB port on your computer.
- The keypad will automatically switch to wired mode.
2.4G Wireless Connection
- Locate the 2.4G USB receiver (often stored magnetically within the keypad for portability).
- Plug the USB receiver into an available USB port on your PC or notebook.
- Locate the power switch on the keypad and slide it to the 'ON' position.
- If the keypad does not connect automatically, press the FN + INS keys simultaneously and hold for more than 3 seconds to enter the code pairing state. The keypad should then connect.
- When using 2.4G wireless, unplugging the USB receiver will automatically switch the keypad to 2.4G mode (if it was previously in wired mode).

Image: Step-by-step visual guide for connecting the Aigo A18 keypad via wired USB Type-C and 2.4G wireless modes.
Operating Instructions
Key Functions
The Aigo A18 features 22 independent keys, providing full coverage of commonly used numeric and function keys to improve work efficiency. Key functions include:
- Numeric Keys (0-9): Standard number input.
- Arithmetic Operators (+, -, *, /): For calculations.
- INS (Insert): Also serves as the 2.4G wireless indicator light.
- NUM (Num Lock): Toggles numeric keypad functionality.
- HOME, END, PGUP, PGDN: Navigation keys, accessible via the numeric pad when Num Lock is off.
- FN (Function): Used in combination with other keys for special functions (e.g., pairing).
- Calculator Key: Dedicated key for quick access to calculator applications.

Image: The Aigo A18 keypad demonstrating its quick calculator function, showing the keypad next to a calculator application on a screen.
Full Key No Punch Design
The keypad supports a full key no punch (N-key rollover) design, ensuring that all key presses are registered accurately and promptly, even when multiple keys are pressed simultaneously. This eliminates key conflicts and provides a smooth typing experience, especially for fast typists.
Indicator Light
The keypad features a bottom status indicator light to quickly convey its working status:
- Wired Mode: The back key light is ON.
- 2.4G Wireless Mode: The INS key light is ON.

Image: The Aigo A18 keypad highlighting its full key no punch design and the location of the indicator light.
Maintenance
Keycaps
The Aigo A18 uses PBT two-color injection molded keycaps. PBT material is known for its durability, resistance to wear, and fine texture, making it less prone to oil buildup compared to ABS keycaps. This ensures a comfortable feel and long-lasting aesthetic.

Image: Close-up view of the Aigo A18's PBT two-color keycaps, highlighting their texture and durability.
Cleaning
- To clean the keycaps, gently remove them using a keycap puller (if available).
- Wipe the keycaps with a soft, damp cloth. For stubborn dirt, a mild soap solution can be used, ensuring they are completely dry before reattaching.
- Use compressed air to remove dust and debris from between the switches.
- Wipe the body of the keypad with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
Hot-Swappable Switches
The Aigo A18 supports a full-key hot-swappable design, allowing you to freely replace the mechanical switches without soldering. This feature enables you to customize the typing feel and easily replace faulty switches.

Image: The Aigo A18 keypad demonstrating its hot-swappable switch feature, showing switches being removed and inserted.
- To remove a switch, use a switch puller to gently grasp the switch and pull it straight up.
- To install a new switch, align the pins of the switch with the holes on the PCB and press down firmly until it clicks into place. Ensure the pins are not bent.
- The keypad supports both three-legged and five-legged shaft body switches.
Troubleshooting
- Keypad not responding in wireless mode:
Ensure the power switch is 'ON'. Check if the 2.4G USB receiver is securely plugged into your computer. Try re-pairing by pressing FN + INS for 3 seconds. Ensure the keypad is charged. - Keypad not responding in wired mode:
Verify that the USB Type-C cable is securely connected to both the keypad and your computer. Try a different USB port or cable. - Keys not registering or double-typing:
This could indicate a loose or faulty switch. Utilize the hot-swappable feature to reseat or replace the affected switch. Clean any debris around the switch. - Keypad not charging:
Ensure the USB Type-C cable is properly connected to a working power source and the keypad. Try a different cable or charging port. - Incorrect key layout (e.g., expecting ABNT2):
The Aigo A18 is typically manufactured with a standard UK layout as indicated in specifications. If you require a specific regional layout like ABNT2, please verify product details with the seller before purchase, as the physical keycap legends and internal mapping may not be compatible with other layouts.
Specifications
| Feature | Detail |
|---|---|
| Brand | Aigo |
| Model | A18 |
| Number of Keys | 22 Independent Keys |
| Connection Type | 2.4G Wireless, USB Type-C Wired (Dual Mode) |
| Battery | 600mAh Rechargeable Lithium Polymer Battery |
| Charging Time | Approx. 2 hours |
| Usage Time | Approx. 45 days (laboratory test results, actual usage may vary) |
| Key Switch | Yellow Switch (Linear Axis) |
| Switch Specifications (Yellow) | Operating Force: 45±5gf, Conduction Stroke: 2.0±0.6mm, Total Trip: 4.0±0.4mm, Life: 50 million times |
| Hot-Swappable | Yes, Full-Key (supports 3-legged and 5-legged switches) |
| Keycaps | PBT Two-Color Injection Molding |
| Layout | Mini Keyboard, Numeric Pad |
| Interface Type | USB |
| Operation Style | Mechanical |
| Language | UK |
| Backlight Type | No Backlight |
| Full Size Keyboard | No |
| Wrist Support | No |
| Data Cable Length | 1500mm |
| Product Weight | Approx. 213g |
| System Compatibility | Windows/Apple/iOS |
| Certification | CE, FCC, RoHS |

Image: Detailed product parameters for the Aigo A18 keypad, including battery, shaft life, dimensions, and other specifications.

Image: Specifications and force-travel diagram for the Yellow (linear) mechanical switches used in the Aigo A18 keypad.
User Tips
- Maximize Battery Life: When not in use, remember to switch off the keypad to conserve battery. The retractable switch button helps save energy.
- Utilize Dual Mode: Take advantage of both wired and wireless connections. Use wired mode for stable, low-latency connections during critical tasks, and wireless for portability and a clutter-free desk.
- Keep Receiver Safe: The 2.4G USB receiver is small. When traveling or not using wireless mode, store it securely, ideally in the magnetic compartment within the keypad itself, to prevent loss.
- Explore Switch Customization: If you desire a different typing feel, the hot-swappable design allows you to experiment with various 3-pin or 5-pin mechanical switches. Ensure switches are properly seated after replacement.
- Regular Cleaning: Periodically clean the keycaps and the area around the switches to prevent dust and debris buildup, which can affect performance and longevity.
Warranty and Support
For specific warranty details, please refer to the documentation included with your product packaging or contact the seller directly. Keep your proof of purchase for any warranty claims.
For technical support or further assistance, please reach out to the Aigo Official Store customer service.





